On Tue, 15 Jun 2010 12:09:45 -0700 (PDT), Ippei Okamura
wrote:

Hello,

I have Sony PVM-2950 with pincushion problem.
The image bows toward the center of the screen from both top and
bottom. I believe this symptom is called "horizontal" or "north-
south" pincushion problem.
I tired to adjust it in service mode, but I was unable to control the
amount of bowing at top and bottom of the screen. I can control
barrel shaped pincushion (east-west) but it does nothing on top and
bottom of the screen.

Is there anything that I can adjust horizontal pincushion without
opening the set?
Could somebody please give me a clue on what is causing this problem
and where and what to look for?
I have a service manual but because I am not an expert, only thing I
can think of is some failure in VC, DX, or part of A board.

This is first time I'm posting, so please let me know if I'm doing
something wrong.
I would appreciate any response..


Do you have an ESR meter? We usually find many bad electrolytics in
the deflection circuits of these units. Electrolytic failure causes
the majority of all failures on this model including pincushioning.
Chuck